diff --git a/src/app/pages/auth/AuthLayout.tsx b/src/app/pages/auth/AuthLayout.tsx
index dc96af16..19671a55 100644
--- a/src/app/pages/auth/AuthLayout.tsx
+++ b/src/app/pages/auth/AuthLayout.tsx
@@ -251,7 +251,7 @@ export function AuthLayout() {
           pageHeight: page.clientHeight,
           mascotTopOffset: readPx(s, '--vojo-mascot-top'),
           mascotHeight: mascot.offsetHeight,
-          modalHeight: modal.offsetHeight,
+          modalHeight: modal.scrollHeight,
           footerHeight: footer.offsetHeight || readPx(s, '--vojo-footer-space', footer.offsetHeight),
           anchorRatio: readNum(s, '--vojo-anchor-ratio', 0.58),
           minTop: readPx(s, '--vojo-modal-min-top'),
@@ -269,7 +269,6 @@ export function AuthLayout() {
     const ro = new ResizeObserver(update);
     ro.observe(page);
     ro.observe(mascot);
-    ro.observe(modal);
     ro.observe(footer);
     window.addEventListener('resize', update);